height = 1.75
weight  = 80.5
BMI = height / weight

if BMI < 18.5:
    print('过轻')
elif BMI < 25:
    print('正常')
elif BMI < 28:
    print('过重')
elif BMI < 32:
    print('肥胖')
else:
    print('严重肥胖')


print('height=', height)
print('weight=', weight)
